Flux for enamel, glass, and ceramic materials



Sept. 2a, 1926.

HENRY BLUMENBERG, JR OF IMOAIPA, NEVADA, ASSIGNOR T STOCKHOLDERSSYNDICATE, DE LOS ANGELES, CALIFORNIA, A CORPORATION OF CALIFORNIA.

FLUX FOR ENAMEL, GLASS, AND CERAMIC MATERIALS.

No Drawing.

My invention relates to a flux for enamel composition for metal surfacesand glass and ceramic compositions, and has for its object to producesuch compositions which after fusion h'avea greater brilliancy andelasticity than enamels, glass and ceramic compositions made with sodiumborate com.- pounds.

My invention COIlSlSt-S of the composition hereinafter described andclaimed:

It is a well known fact that boron trioxide possesses weak basicproperties and combines with the stronger acids to form salts. Forinstance, if phosphoric acid'is mixed with boric acid a White amorphousmass of boron phosphate is formed, in accordance with the followingequation:

2B 3 2H P0 B 03 P I use this boron phosphate as an ingredient in fluxesfor enamel glass andceramic compositions to replace the boron trioxide.As an illustration an enamel mixture is 'iven:

Percent.

F eldspar 45 Tin oxide 7 Application filed October 13, 1924. Serial No.743,472.

. Per cent. Sodium carbonate Sodium nitrate 3 Lead phosphate '10 Boronphosphate 30 The proportion of the boron phosphate in the above exampleis given as 30%. It will be understood, however, that the same may 85 bevaried within Wide limits, depending upon the nature of the composition,Whether it is an enamel, glass or ceramic material. Fluxes containingboron phosphate may be fused at temperatures several hundred de- 40grees C. lower than required for fluxes ordi- HENRY BLUMENBERG, JR.

